[net-next 02/11] net/mlx5e: SHAMPO: Reorganize mlx5_rq_shampo_alloc
From: Saeed Mahameed <saeed@kernel.org>
Date: 2025-01-16 21:55:52
Subsystem:
mellanox ethernet driver (mlx5e), mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Saeed Mahameed <saeedm@nvidia.com> Drop redundant SHAMPO structure alloc/free functions. Gather together function calls pertaining to header split info, pass header per WQE (hd_per_wqe) as parameter to those function to avoid use before initialization future mistakes. Allocate HW GRO related info outside of the header related info scope. Signed-off-by: Saeed Mahameed <saeedm@nvidia.com> Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com> Reviewed-by: Tariq Toukan <tariqt@nvidia.com> --- drivers/net/ethernet/mellanox/mlx5/core/en.h | 1 - .../net/ethernet/mellanox/mlx5/core/en_main.c | 132 +++++++++--------- 2 files changed, 63 insertions(+), 70 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 979fc56205e1..66c93816803e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h@@ -628,7 +628,6 @@ struct mlx5e_shampo_hd { struct mlx5e_frag_page *pages; u32 hd_per_wq; u16 hd_per_wqe; - u16 pages_per_wq; unsigned long *bitmap; u16 pi; u16 ci;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index bd41b75d246e..c687c926cba3 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c@@ -330,47 +330,6 @@ static inline void mlx5e_build_umr_wqe(struct mlx5e_rq *rq, ucseg->mkey_mask = cpu_to_be64(MLX5_MKEY_MASK_FREE); } -static int mlx5e_rq_shampo_hd_alloc(struct mlx5e_rq *rq, int node) -{ - rq->mpwqe.shampo = kvzalloc_node(sizeof(*rq->mpwqe.shampo), - GFP_KERNEL, node); - if (!rq->mpwqe.shampo) - return -ENOMEM; - return 0; -} - -static void mlx5e_rq_shampo_hd_free(struct mlx5e_rq *rq) -{ - kvfree(rq->mpwqe.shampo); -} - -static int mlx5e_rq_shampo_hd_info_alloc(struct mlx5e_rq *rq, int node) -{ - struct mlx5e_shampo_hd *shampo = rq->mpwqe.shampo; - - shampo->bitmap = bitmap_zalloc_node(shampo->hd_per_wq, GFP_KERNEL, - node); - shampo->pages = kvzalloc_node(array_size(shampo->hd_per_wq, - sizeof(*shampo->pages)), - GFP_KERNEL, node); - if (!shampo->bitmap || !shampo->pages) - goto err_nomem; - - return 0; - -err_nomem: - kvfree(shampo->bitmap); - kvfree(shampo->pages); - - return -ENOMEM; -} - -static void mlx5e_rq_shampo_hd_info_free(struct mlx5e_rq *rq) -{ - kvfree(rq->mpwqe.shampo->bitmap); - kvfree(rq->mpwqe.shampo->pages); -} - static int mlx5e_rq_alloc_mpwqe_info(struct mlx5e_rq *rq, int node) { int wq_sz = mlx5_wq_ll_get_size(&rq->mpwqe.wq);
@@ -581,19 +540,18 @@ static int mlx5e_create_rq_umr_mkey(struct mlx5_core_dev *mdev, struct mlx5e_rq } static int mlx5e_create_rq_hd_umr_mkey(struct mlx5_core_dev *mdev, - struct mlx5e_rq *rq) + u16 hd_per_wq, u32 *umr_mkey) { u32 max_ksm_size = BIT(MLX5_CAP_GEN(mdev, log_max_klm_list_size)); - if (max_ksm_size < rq->mpwqe.shampo->hd_per_wq) { + if (max_ksm_size < hd_per_wq) { mlx5_core_err(mdev, "max ksm list size 0x%x is smaller than shampo header buffer list size 0x%x\n", - max_ksm_size, rq->mpwqe.shampo->hd_per_wq); + max_ksm_size, hd_per_wq); return -EINVAL; } - - return mlx5e_create_umr_ksm_mkey(mdev, rq->mpwqe.shampo->hd_per_wq, + return mlx5e_create_umr_ksm_mkey(mdev, hd_per_wq, MLX5E_SHAMPO_LOG_HEADER_ENTRY_SIZE, - &rq->mpwqe.shampo->mkey); + umr_mkey); } static void mlx5e_init_frags_partition(struct mlx5e_rq *rq)
@@ -755,6 +713,33 @@ static int mlx5e_init_rxq_rq(struct mlx5e_channel *c, struct mlx5e_params *param xdp_frag_size); } +static int mlx5e_rq_shampo_hd_info_alloc(struct mlx5e_rq *rq, u16 hd_per_wq, int node) +{ + struct mlx5e_shampo_hd *shampo = rq->mpwqe.shampo; + + shampo->hd_per_wq = hd_per_wq; + + shampo->bitmap = bitmap_zalloc_node(hd_per_wq, GFP_KERNEL, node); + shampo->pages = kvzalloc_node(array_size(hd_per_wq, sizeof(*shampo->pages)), + GFP_KERNEL, node); + if (!shampo->bitmap || !shampo->pages) + goto err_nomem; + + return 0; + +err_nomem: + kvfree(shampo->pages); + bitmap_free(shampo->bitmap); + + return -ENOMEM; +} + +static void mlx5e_rq_shampo_hd_info_free(struct mlx5e_rq *rq) +{ + kvfree(rq->mpwqe.shampo->pages); + bitmap_free(rq->mpwqe.shampo->bitmap); +} + static int mlx5_rq_shampo_alloc(struct mlx5_core_dev *mdev, struct mlx5e_params *params, struct mlx5e_rq_param *rqp,
@@ -762,42 +747,51 @@ static int mlx5_rq_shampo_alloc(struct mlx5_core_dev *mdev, u32 *pool_size, int node) { + void *wqc = MLX5_ADDR_OF(rqc, rqp->rqc, wq); + u16 hd_per_wq; + int wq_size; int err; if (!test_bit(MLX5E_RQ_STATE_SHAMPO, &rq->state)) return 0; - err = mlx5e_rq_shampo_hd_alloc(rq, node); - if (err) - goto out; - rq->mpwqe.shampo->hd_per_wq = - mlx5e_shampo_hd_per_wq(mdev, params, rqp); - err = mlx5e_create_rq_hd_umr_mkey(mdev, rq); + + rq->mpwqe.shampo = kvzalloc_node(sizeof(*rq->mpwqe.shampo), + GFP_KERNEL, node); + if (!rq->mpwqe.shampo) + return -ENOMEM; + + /* split headers data structures */ + hd_per_wq = mlx5e_shampo_hd_per_wq(mdev, params, rqp); + err = mlx5e_rq_shampo_hd_info_alloc(rq, hd_per_wq, node); if (err) - goto err_shampo_hd; - err = mlx5e_rq_shampo_hd_info_alloc(rq, node); + goto err_shampo_hd_info_alloc; + + err = mlx5e_create_rq_hd_umr_mkey(mdev, hd_per_wq, &rq->mpwqe.shampo->mkey); if (err) - goto err_shampo_info; + goto err_umr_mkey; + + rq->mpwqe.shampo->key = cpu_to_be32(rq->mpwqe.shampo->mkey); + rq->mpwqe.shampo->hd_per_wqe = + mlx5e_shampo_hd_per_wqe(mdev, params, rqp); + wq_size = BIT(MLX5_GET(wq, wqc, log_wq_sz)); + *pool_size += (rq->mpwqe.shampo->hd_per_wqe * wq_size) / + MLX5E_SHAMPO_WQ_HEADER_PER_PAGE; + + /* gro only data structures */ rq->hw_gro_data = kvzalloc_node(sizeof(*rq->hw_gro_data), GFP_KERNEL, node); if (!rq->hw_gro_data) { err = -ENOMEM; goto err_hw_gro_data; } - rq->mpwqe.shampo->key = - cpu_to_be32(rq->mpwqe.shampo->mkey); - rq->mpwqe.shampo->hd_per_wqe = - mlx5e_shampo_hd_per_wqe(mdev, params, rqp); - rq->mpwqe.shampo->pages_per_wq = - rq->mpwqe.shampo->hd_per_wq / MLX5E_SHAMPO_WQ_HEADER_PER_PAGE; - *pool_size += rq->mpwqe.shampo->pages_per_wq; + return 0; err_hw_gro_data: - mlx5e_rq_shampo_hd_info_free(rq); -err_shampo_info: mlx5_core_destroy_mkey(mdev, rq->mpwqe.shampo->mkey); -err_shampo_hd: - mlx5e_rq_shampo_hd_free(rq); -out: +err_umr_mkey: + mlx5e_rq_shampo_hd_info_free(rq); +err_shampo_hd_info_alloc: + kvfree(rq->mpwqe.shampo); return err; }
@@ -809,7 +803,7 @@ static void mlx5e_rq_free_shampo(struct mlx5e_rq *rq) kvfree(rq->hw_gro_data); mlx5e_rq_shampo_hd_info_free(rq); mlx5_core_destroy_mkey(rq->mdev, rq->mpwqe.shampo->mkey); - mlx5e_rq_shampo_hd_free(rq); + kvfree(rq->mpwqe.shampo); } static int mlx5e_alloc_rq(struct mlx5e_params *params,
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2.48.0